[dpdk-dev] [PATCH v2 21/22] net/ena: report default ring size

[Michal Krawczyk]

From: Stanislaw Kardach <kda at semihalf.com>

Remove invalid ring size alignment logic and add default rx and tx port
ring sizes to the device info spec.

The logic in lines 1297 and 1371 is invalid. The
RTE_ETH_DEV_FALLBACK_RX_RINGSIZE (and the TX counterpart) is a value
that rte_eth_rx_queue_setup() will set if
dev_info.default_rxportconf.ring_size is 0 and user provided 0 in
nb_rx_desc argument. However the current code treats it as a hint for
the PMD to change the ring size to internal defaults.

Additionally since the ENA_DEFAULT_RING_SIZE is defined, report it in
the device capabilities so that both rte_ethdev code and the user can
utilize it for device configuration.

Fixes: ea93d37eb49d ("net/ena: add HW queues depth setup")
Cc: stable at dpdk.org

Signed-off-by: Stanislaw Kardach <kda at semihalf.com>
Reviewed-by: Michal Krawczyk <mk at semihalf.com>
Reviewed-by: Igor Chauskin <igorch at amazon.com>
Reviewed-by: Shay Agroskin <shayagr at amazon.com>
---
 drivers/net/ena/ena_ethdev.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index 73e99e956a..c5d8e7d43e 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -1294,9 +1294,6 @@ static int ena_tx_queue_setup(struct rte_eth_dev *dev,
 		return -EINVAL;
 	}
 
-	if (nb_desc == RTE_ETH_DEV_FALLBACK_TX_RINGSIZE)
-		nb_desc = adapter->max_tx_ring_size;
-
 	txq->port_id = dev->data->port_id;
 	txq->next_to_clean = 0;
 	txq->next_to_use = 0;
@@ -1368,9 +1365,6 @@ static int ena_rx_queue_setup(struct rte_eth_dev *dev,
 		return ENA_COM_FAULT;
 	}
 
-	if (nb_desc == RTE_ETH_DEV_FALLBACK_RX_RINGSIZE)
-		nb_desc = adapter->max_rx_ring_size;
-
 	if (!rte_is_power_of_2(nb_desc)) {
 		PMD_DRV_LOG(ERR,
 			"Unsupported size of RX queue: %d is not a power of 2.\n",
@@ -2130,6 +2124,9 @@ static int ena_infos_get(struct rte_eth_dev *dev,
 	dev_info->tx_desc_lim.nb_mtu_seg_max = RTE_MIN(ENA_PKT_MAX_BUFS,
 					adapter->max_tx_sgl_size);
 
+	dev_info->default_rxportconf.ring_size = ENA_DEFAULT_RING_SIZE;
+	dev_info->default_txportconf.ring_size = ENA_DEFAULT_RING_SIZE;
+
 	return 0;
 }
 
-- 
2.25.1